Almost all of them have European surnames, but only ~20% of them have a European ancestor. If you are white, chances are good one of your ancestors came from France, or used a French surname to fool the authorities.
1 AC, or alternating current means the electrical current is alternating directions in a repetitive pattern.  AC is created by generators in power plants, and other sources. This AC current is delivered to our homes and businesses by the power lines we see everywhere.
Simple AC Generator [edit]. An alternative method of generating an alternating current is to rotate a permanent magnet in a gap between two coils. This has the advantage of not requiring a commutator (the coil is the stator), but often a coil is lighter than a magnet, and so it is more efficient to use a rotating coil.